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Derivatives - Schedule of Fair Value of Outstanding Derivative Instruments (Details) - USD ($)
$ in Millions
Apr. 04, 2021
Sep. 30, 2020
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 5.8 $ 1.2
Derivative Liabilities 9.8 14.2
Commodity Swaps | Other receivables | Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Assets 1.3 0.7
Commodity Swaps | Deferred charges and other | Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Assets 0.0 0.1
Commodity Swaps | Accounts payable | Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 0.1 0.0
Foreign Exchange Contracts | Other receivables | Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Assets 1.3 0.0
Foreign Exchange Contracts | Other receivables | Not Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Assets 2.8 0.4
Foreign Exchange Contracts | Deferred charges and other | Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Assets 0.4 0.0
Foreign Exchange Contracts | Accounts payable | Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 7.2 3.8
Foreign Exchange Contracts | Accounts payable | Not Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 2.4 10.1
Foreign Exchange Contracts | Other long term liabilities | Designated as Hedging    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities $ 0.1 $ 0.3